A possible explanation of reversed magnetic field features observed in NOAA AR 7321 |
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Authors: | Yang Liu Nandita Srivastava Debi Prasad Wei Li Guoxiang Ai |
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Institution: | (1) Beijing Astronomical Observatory, Chinese Academy of Sciences, 100080 Beijing, China;(2) Udaipur Solar Observatory, Physical Research Laboratory, 11, Vidya Marg, 313001 Udaipur, India |
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Abstract: | Observations of reversed-polarity features in the chromosphere as well as in the photosphere in the form of magnetic gulfs or islands of opposite polarity have been reported recently. In this paper, we present a possible explanation for the appearance of reversed-polarity features observed in the chromospheric magnetograms of the NOAA AR 7321 observed during October 25–27, 1992. It is suggested that the large-scale reversed-polarity features may occur due to the twisting of the smaller-scale magnetic flux tubes in the layer between the photosphere and the chromosphere. |
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